|"Are you a wizard or not?"
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before 1962 (most likely)
Mr. McLaggen was the father of Cormac McLaggen. On 1 September, 1997, when Death Eaters stopped the Hogwarts Express en route to Hogwarts School of Witchcraft and Wizardry and boarded it to search for Harry Potter, Cormac threatened them that his father would hear about their actions. Death Eaters, however, completely ignored this threat and continued their search.
- Harry Potter and the Deathly Hallows: Part 1 (First mentioned)